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 NEW    Bruce Heran outlines the details and construction of his simple DIY 6DJ8 (ECC88) Tube Hi-Fi Headphone Amplifier Project.

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00097.jpg
00097.jpgEI Trans and rectifier4190 viewsStill in the building process, the EI transformer (24VCT @ 6amps) and the rectifiers (MUR860 diodes) and two 10000uF caps.
Sansui-SR-1050C-Fully-Manual-Turntable.jpg
Sansui-SR-1050C-Fully-Manual-Turntable.jpgSansui SR-1050C Turntable4178 viewsA Sansui SR-1050C, fully manual phono turntable.

I did the following mods to it:

1- Installed a new Shure m350ed cartridge
2- Replaced the belt
3- Added a belt strength regulator screw (the original design didnt have it)
4- Replaced the RCAs with gols plated ones
5- Replaced the Saprk Killer cap with X2 cap.
6- Installed ferrite chokes on audio and power cable.
7- Installed an EMI-RFI filter

It sounds and works great now.

Bernardo
KJ1-Class-D-Amp-KJ2-Passive-Linestage.JPG
KJ1-Class-D-Amp-KJ2-Passive-Linestage.JPGAMP6 Amplifier + Passive Linestage4176 viewsTripath T-Amp using a 41Hz Amp6 T-Amp module and a toroidal power transformer. The linestage uses a top quality rotary switch and Gold Point attenuator. More info and FPD files are available on my project page.
Cheers, Keith
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top1.jpgPush-Pull 6T9 Stereo Tube Amplifier4166 viewsThis is a project I started some time ago which was inspired by the Spare Time Gizmo's 6T9 Tube Amplifier Kit. I decided to make it push-pull using circuit ideas from my Eico HF-81 and my RCA Receiving tube manual. The combination wood and brass chassis came about when I found a small sheet of brass shoved under a cabinet and long forgotten about at work. It took a bit of work to clean it up and polish it to that shine! The wood is poplar purchased at Lowes, stained with Minwax Red Mahogany stain and finished with Amber Shellac.

Additional information: 6T9 Push-Pull Tube Amplifier
YAHA-Headphone-Amp.jpg
YAHA-Headphone-Amp.jpgYAHA Headphone Amplifier4157 viewsHere is on of my YAHA builds, I have never been a fan of Altoid tins. Later I used the Yaha voltage gain stage in my 12AU7 Tube / IRF612 MOSFET Hybrid Headphone Amplifier project.
OatleyK281.jpg
OatleyK281.jpgOatley Electronics sub-mini tube/chip amp hybrid K2814152 viewsThere has been a number of hybrids over the years but none more unusual than Oatley Electronics, of Sydney Australia’s, Jan6418/LM1875 kit amp. Not crazy enough for you? How about we throw in a 24VDC International regulated switch mode power supply and build the finished amp as a dual mono construction? Crazy? You expected less from Australian Justic Branko owner of Oatley? Still not crazy enough? How about the amp only puts out 5W. Yes the chip is capable of 20W easy! Think what you can do with this kit.
This is my dead stock, out of the box build. And it sounds bloody great! Good sonic depth with chip amp holographic sound stage and tight, exceptionally controlled bass. And all for AU$29 plus shipping. Nuts!!! Not crazy enough. I added twin UV LEDs on the front panel to indicate when both modules are powered. That’s Crazy.
Wooden-5687-Valve-Preamplifier.jpg
Wooden-5687-Valve-Preamplifier.jpg5687 Valve Line Preamplifier4141 viewsThis is the second DIY 5687 Valve Preamplifier that I built. The enclosure is a DIY wooden box and painted black.
DIY-KT88-SE-Tube-Amplifier.jpg
DIY-KT88-SE-Tube-Amplifier.jpgKT88 Single Ended Tube Amp Build4118 viewsRear view of the KT88 Single Ended Tube Amplifier. The circuit is just like Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier Schematic.

Additional information and pictures are available on my build log for this project: SE KT88 Tube Amp.
DIY-LM3875-Gainclone~0.jpg
DIY-LM3875-Gainclone~0.jpgDIY LM3875 Gainclone - rear view4110 viewsA gainclone chip amp with an external power supply. The design is based on my Roasting Pan LM3875 Gainclone Chip Amplifier. All wiring is point-to-point.
ZCA_2.jpg
ZCA_2.jpgRadoslav's ZCA (SE class-A mosfet amp) 4106 viewsRadoslav has made a very professional looking build of the ZCA.

See the project page, DIY Class-A 2SK1058 MOSFET Amplifier for the schematic.
Fostex-GK120-Speakers-with-F120A.jpg
Fostex-GK120-Speakers-with-F120A.jpgFostex GK120 Speakers with F120A4100 viewsHello - this is a hard to locate set of speakers! The cabinet is a rare speaker enclosure from Fostex - model GK120. The speaker in each cabinet is the famous F120A. The set operates flawlessly - both aesthetically as well as acoustically. The wood (though I do not know the type) is solid and very nice. The enclosures themselves are made of a see-through Lucite and are definitely a conversion piece.
K12G-Tube-Amplifier-Kit-Inside-Zach.jpg
K12G-Tube-Amplifier-Kit-Inside-Zach.jpgUnderside of Zach's K12G Tube Amplifier Kit4085 viewsThis is an underside view of the K12G tube amplifier kit put together by Zach. You can see that Zach has tried some of the various modifications noted for this kit.

For more information about this tube amplifier kit and possible modifications see the S-5 Electronics DIY Tube Amplifier Kits page
6C33C-6S33S-Single-Ended-Valve-Amplifier.jpg
6C33C-6S33S-Single-Ended-Valve-Amplifier.jpg6C33C (6S33S) Single-Ended Valve Amplifier4067 views6C33C (6S33S) Single-Ended Valve Amplifier with 6E5P preamp valves. The power supply is external to the amplifier. Additional details for this valve amplifier are available in the 6C33C Tube Amplifier thread.
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OwenSpecialFront.JPGThe Owen Gainclone Special4064 viewsI was commissioned to build my ex-boss a chip amp based on my Synergy LM3875 Gainclone Chip Amplifier. This has two LM3875 modules inside with Alps pot, 4oz solid brass volume knob, two 8000uF caps (red) and 1000uF low ESR line caps. Remote PS (left) has fast switch diodes (snubbed),160VA toroidal transformer. Both amp and PS are housed in die-cast cases and stand on solid brass cones. All point-to-point wiring.
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LidOff.JPG"not another chip amp"4028 viewsAfter the Synergy Gainclone amp I promised myself I would not make another chip amp. The point-to-point gainclone amp modules were made twelve months ago but never got used. They comprise of the LM3875 and 10,000uF caps. The PS is rated 160VA with a scavenged microwave mains filter and a snubbed rec. bridge. The amp is compact and very loud with a full and very extended bass with small bookshelf speakers. You feel this amp could power a whole night club. Well it fills this house with clear clean music! And that is how it sounds -> clear and clean!
K-12G-Tube-Amp-Kit-DIY-Enclosure.jpg
K-12G-Tube-Amp-Kit-DIY-Enclosure.jpgK-12G Tube Amplifier Kit and DIY Enclosure4026 viewsForum member DisasterArea has put together a S-5 Electronics K-12G Vacuum Tube Amplifier Kit and built the kit into a fantastic looking enclosure using chassis parts from VT4C.

For more information about this tube amplifier build see this forum thread: First amp build: K-12G tube amp kit.
OTL-Tube-Headphone-Amplifier.jpg
OTL-Tube-Headphone-Amplifier.jpgOTL Tube Headphone Amplifier4025 viewsThis is a picture of a tube headphone amp that I was building but gave up as I could not get it to work properly.
DIY-KT88-Single-Ended-Tube-Amp~1.jpg
DIY-KT88-Single-Ended-Tube-Amp~1.jpgDIY KT88 Single Ended Tube Amp4013 viewsFront view of my KT88 Single Ended Tube Amplifier. The circuit follows Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier Schematic.

Additional information and pictures for this project are available on my build log: SE KT88 Tube Amp.
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PB220014.JPGPCL86 Single-Ended Amplifier4010 viewsSingle-ended amplifier using PCL86 triode / pentode tube

web: http://www.bartech.rulz.hu/
e-mail: kisskozsa@freemail.hu
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DIY-6s45p-300B-GU-48-Tube-Amplifier.jpgDIY 6s45p / 300B / GU-48 Tube Amplifier - 125 Watts3945 viewsMy 125W tube amplifier. The input tube is 6s45p which drives a 300B and is followed by a GU-48 (replacement for the 833 tube). The 6s45p input tube is DC coupled to a 300B. There are no resistors or capacitors in the signal path. The 300B is coupled to a GU-48 tube through a step-down interstage transformer. Driver and output tubes are fixed biased for more natural and dynamic result. Output tube is working at 1000V-250mA. Amplifier gives me 125W single ended sound in class A2 mode. It has very powerful deep bass, mids are very loud and lovely. Highs are very clear. I am feeling like in concert hall. The case is made from 20mm thick African Wenge wood. Chassis is 2 mm thick electrostatic painted steel. The total weight is 50 kg.
614 files on 31 page(s) 16


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